40205420051109 has 32 divisors (see below), whose sum is σ = 54786138511104. Its totient is φ = 26217380766720.

The previous prime is 40205420051107. The next prime is 40205420051161. The reversal of 40205420051109 is 90115002450204.

It is not a de Polignac number, because 40205420051109 - 2¹ = 40205420051107 is a prime.

It is a super-2 number, since 2×40205420051109² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40205420051109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40205420051107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68253379 + ... + 68839919.

It is an arithmetic number, because the mean of its divisors is an integer number (1712066828472).

Almost surely, 2^{40205420051109} is an apocalyptic number.

It is an amenable number.

40205420051109 is a deficient number, since it is larger than the sum of its proper divisors (14580718459995).

40205420051109 is a wasteful number, since it uses less digits than its factorization.

40205420051109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587917.

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 40205420051109 in words is "forty trillion, two hundred five billion, four hundred twenty million, fifty-one thousand, one hundred nine".